DE3169535D1 - Cancelling arrangement for a composite echo signal - Google Patents

Cancelling arrangement for a composite echo signal

Info

Publication number
DE3169535D1
DE3169535D1 DE8181200810T DE3169535T DE3169535D1 DE 3169535 D1 DE3169535 D1 DE 3169535D1 DE 8181200810 T DE8181200810 T DE 8181200810T DE 3169535 T DE3169535 T DE 3169535T DE 3169535 D1 DE3169535 D1 DE 3169535D1
Authority
DE
Germany
Prior art keywords
echo signal
cancelling arrangement
composite echo
composite
cancelling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8181200810T
Other languages
German (de)
English (en)
Inventor
Loic Bernard Yves Guidoux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIGNAUX PARIS FR Cie
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Application granted granted Critical
Publication of DE3169535D1 publication Critical patent/DE3169535D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/237—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using two adaptive filters, e.g. for near end and for end echo cancelling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/232—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using phase shift, phase roll or frequency offset correction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
DE8181200810T 1980-07-21 1981-07-15 Cancelling arrangement for a composite echo signal Expired DE3169535D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8016048A FR2487144B1 (fr) 1980-07-21 1980-07-21 Dispositif d'annulation d'un signal d'echo composite

Publications (1)

Publication Number Publication Date
DE3169535D1 true DE3169535D1 (en) 1985-05-02

Family

ID=9244354

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181200810T Expired DE3169535D1 (en) 1980-07-21 1981-07-15 Cancelling arrangement for a composite echo signal

Country Status (6)

Country Link
US (1) US4862450A (enrdf_load_stackoverflow)
EP (1) EP0044598B1 (enrdf_load_stackoverflow)
JP (1) JPS5757042A (enrdf_load_stackoverflow)
CA (1) CA1181147A (enrdf_load_stackoverflow)
DE (1) DE3169535D1 (enrdf_load_stackoverflow)
FR (1) FR2487144B1 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8205839L (sv) * 1981-10-23 1983-04-24 Western Electric Co Ekoeliminator
FR2528643A1 (fr) * 1982-06-14 1983-12-16 Trt Telecom Radio Electr Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede
US4605826A (en) * 1982-06-23 1986-08-12 Nec Corporation Echo canceler with cascaded filter structure
DE3231055A1 (de) * 1982-08-20 1984-02-23 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur basisbanduebertragung mit echokompensation
IT1208769B (it) * 1983-10-12 1989-07-10 Cselt Centro Studi Lab Telecom Teristiche varianti nel tempo procedimento e dispositivo per la cancellazione numerica dell eco generato in collegamenti con carat
US4682358A (en) * 1984-12-04 1987-07-21 American Telephone And Telegraph Company Echo canceller
CA1238381A (en) * 1985-03-14 1988-06-21 Ephraim Arnon Multi-stage echo canceller
NL8600817A (nl) * 1986-03-28 1987-10-16 At & T & Philips Telecomm Adaptief filter voor het vormen van een echokompensatiesignaal in een zend-ontvangstelsel voor het in duplexvorm bedrijven van digitale communicatie over een enkel geleiderpaar.
EP0280898A1 (de) * 1987-02-18 1988-09-07 Siemens Aktiengesellschaft Schaltungsanordnung zum Unterdrücken von Echosignalen
US5125024A (en) * 1990-03-28 1992-06-23 At&T Bell Laboratories Voice response unit
US5682378A (en) * 1995-11-14 1997-10-28 Paradyne Corporation Echo cancellation for modems
CN1166160C (zh) * 1996-05-31 2004-09-08 皇家菲利浦电子有限公司 抑制输入信号中干扰成分的设备
JP2001525147A (ja) * 1998-01-30 2001-12-04 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 通信システムにおいてエコーキャンセル方法、通信システム、通信装置、及び、コードレス電話機の無線基地局
US6580696B1 (en) * 1999-03-15 2003-06-17 Cisco Systems, Inc. Multi-adaptation for a voice packet based
US6351531B1 (en) 2000-01-21 2002-02-26 Motorola, Inc. Method and system for controlling echo cancellation using zero echo path, ringing, and off-hook detection
JP4410098B2 (ja) * 2002-05-23 2010-02-03 アナログ デバイスズ インコーポレイテッド 等化用遅延時間推定

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647992A (en) * 1970-03-05 1972-03-07 Bell Telephone Labor Inc Adaptive echo canceller for nonlinear systems
US4072830A (en) * 1976-10-04 1978-02-07 Bell Telephone Laboratories, Incorporated Variable phase shifter for adaptive echo cancellers
SE426763B (sv) * 1977-01-17 1983-02-07 Trt Telecom Radio Electr Digital ekoeliminator for ett modem for dataoverforing genom modulation av en bervag
FR2460075B1 (fr) * 1979-06-22 1988-12-09 Cit Alcatel Annuleur d'echo adaptatif pour transmission de donnees en duplex
FR2479617A1 (fr) * 1980-03-26 1981-10-02 Trt Telecom Radio Electr Annuleur d'echo pour signal d'echo a phase variable

Also Published As

Publication number Publication date
US4862450A (en) 1989-08-29
JPH0136737B2 (enrdf_load_stackoverflow) 1989-08-02
FR2487144B1 (fr) 1986-10-24
EP0044598B1 (fr) 1985-03-27
CA1181147A (en) 1985-01-15
FR2487144A1 (fr) 1982-01-22
EP0044598A1 (fr) 1982-01-27
JPS5757042A (en) 1982-04-06

Similar Documents

Publication Publication Date Title
GB2087803B (en) A ddor stop arrangement for a vehicle
AU570635B2 (en) Echo cancellation
DE3169535D1 (en) Cancelling arrangement for a composite echo signal
DE3275799D1 (en) Echo cancelling system
GB2072856B (en) Travel transducer
GB2078965B (en) Processing transducer signals
GB2075313B (en) Echo cancellers
DE3267115D1 (en) Arrangement for cancelling echo signals
AU545886B2 (en) Echo canceller
GB2070388B (en) Transducer
JPS5783936A (en) Echo cancelling device
JPS57124945A (en) Echo canceller
JPS56168375A (en) Signal trnasmitter
JPS56153518A (en) Transducer
GB2090708B (en) Echo canceller system
GB2118805B (en) Ghost signal cancelling systems
JPS56122543A (en) Echo suppressor
JPS56153519A (en) Transducer
GB2073553B (en) Ghost cancelling arrangements
GB2067763B (en) Position transducers
JPS57105100A (en) Transducer system
JPS5782255A (en) Transducer unit
GB2159376B (en) An echo cancelling system
DE3165234D1 (en) Antenna for a submarine
JPS5732497A (en) Echo adding unit

Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: COMPAGNIE DES SIGNAUX, PARIS, FR

8328 Change in the person/name/address of the agent

Free format text: GRUENECKER, KINKELDEY, STOCKMAIR & SCHWANHAEUSSER, ANWALTSSOZIETAET, 80538 MUENCHEN

8339 Ceased/non-payment of the annual fee